CN202492880U - Hydraulically-controlled energy-saving device for crawler-type hydraulic excavator - Google Patents

Hydraulically-controlled energy-saving device for crawler-type hydraulic excavator Download PDF

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Publication number
CN202492880U
CN202492880U CN 201220037066 CN201220037066U CN202492880U CN 202492880 U CN202492880 U CN 202492880U CN 201220037066 CN201220037066 CN 201220037066 CN 201220037066 U CN201220037066 U CN 201220037066U CN 202492880 U CN202492880 U CN 202492880U
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CN
China
Prior art keywords
valve
rotary motor
oil
hydraulic
communicated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201220037066
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Chinese (zh)
Inventor
李春生
王保森
王正磊
满涛
谢广
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STRONG CONSTRUCTION MACHINERY (JINING) CO Ltd
Strong Construction Machinery Co Ltd
Original Assignee
STRONG CONSTRUCTION MACHINERY (JINING) CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by STRONG CONSTRUCTION MACHINERY (JINING) CO Ltd filed Critical STRONG CONSTRUCTION MACHINERY (JINING) CO Ltd
Priority to CN 201220037066 priority Critical patent/CN202492880U/en
Application granted granted Critical
Publication of CN202492880U publication Critical patent/CN202492880U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a hydraulically-controlled energy-saving device for a crawler-type hydraulic excavator, comprising a pilot handle, a counterbalance valve, a bypass valve, a hydraulic pump and an engine, wherein the engine is connected with the hydraulic pump, the hydraulic pump is communicated with a hydraulic oil tank, a shuttle valve is arranged between a left connecting hose and a right connecting hose of the pilot handle, the middle valve plug of the shuttle valve is connected with the control cavities of the counterbalance valve and the bypass valve through the connecting hoses, and the left and the right connecting hoses of the pilot handle are respectively connected with the two ends of the control cavity of the main valve plug of a rotary motor; the hydraulic pump is connected with the control cavity of the main valve plug of the rotary motor by an oil way, and the control cavity of the main valve plug of the rotary motor is communicated with the rotary motor by an oil way; the two ends of the counterbalance valve and the bypass valve are respectively communicated with the control cavity of the main valve plug of the rotary motor and the hydraulic oil tank by oil ways, and an oil way communicated with a rotary motor oil replenishing port is arranged on the oil ways which communicate the counterbalance valve and the bypass valve with the control cavity of the main valve plug of the rotary motor. The hydraulically-controlled energy-saving device has the characteristics of oil conservation, small exhaust emission volume, low noise and high efficiency.

Description

Crawler hypraulic excavator hydraulic control energy saver
Technical field the utility model belongs to the hydraulic crawler excavator technical field of hydraulic, relates to a kind of crawler hypraulic excavator hydraulic control energy saver, and this device is applicable to hydraulic crawler excavator gyration control.
All increased Hydraulic Elements on the background technology hydraulic control system way to cycle oil that hydraulic crawler excavator uses now both at home and abroad: counterbalance valve and bypass valve increase oil compensation pressure and return oil pressure.In the process of avoiding the digger operating device high speed rotary, the oil-feed of rotary motor oil-in is not enough, and emptying phenomenon takes place.Simultaneously, also avoid in the rotary braking process, because oil return opening oil return resistance is little, pressed deficiency, braking moment is little, causes the problem of rotary braking time lengthening.
But the hydraulic control system way to cycle oil increases counterbalance valve can make excavator in whole operation cycle process with bypass valve, all has return oil pressure, makes that action resistance beyond the revolution becomes greatly, actuation time is elongated.In this process, the loss of system liquid pressure energy is bigger, and system temperature rises, and increases the Hydraulic Elements leakage rate, influences potted component performance and application life, has reduced the reliability of system.
The purpose of summary of the invention the utility model is to solve prior art to exist the hydraulic pressure loss of energy than technical problem big and that application life is short, a kind of crawler hypraulic excavator hydraulic control energy saver is provided, to overcome the deficiency of prior art.
The utility model crawler hypraulic excavator hydraulic control energy saver; It comprises guide's handle, counterbalance valve, bypass valve, hydraulic pump and motor; Said motor is connected with hydraulic pump; Hydraulic pump is communicated with hydraulic oil container; Be provided with shuttle valve between left and right two connection flexible pipes of guide's handle, its main points are that the middle spool of said shuttle valve is connected with the control chamber of counterbalance valve and bypass valve through connecting flexible pipe, and left and right two connection flexible pipes of guide's handle are connected with the two ends of rotary motor main valve plug control chamber respectively; Said hydraulic pump is connected with rotary motor main valve plug control chamber through oil circuit, and said rotary motor main valve plug control chamber is communicated with rotary motor through oil circuit; The two ends of said counterbalance valve and bypass valve are communicated with rotary motor main valve plug control chamber and hydraulic oil container through oil circuit respectively, and the oil circuit that counterbalance valve and bypass valve are communicated with rotary motor main valve plug control chamber is provided with the oil circuit that is communicated with rotary motor repairing mouth.
The utility model has solved prior art and has existed the hydraulic pressure loss of energy than technical problem big and that application life is short, has characteristics fuel-efficient, that discharge amount of exhaust gas is little, noise is low, efficient is high, thereby reaches the economic effect of energy-conserving and environment-protective.
Appended drawings is the utility model structural principle sketch map.
Among the figure 1, guide's handle 2, shuttle valve 3, connect flexible pipe 4, connect flexible pipe 5, connect flexible pipe 6, counterbalance valve 7, bypass valve 8, hydraulic pump 9, motor 10, rotary motor main valve plug control chamber 11, rotary motor 12, hydraulic oil container 13, repairing mouth
The specific embodiment is with reference to accompanying drawing; It comprises guide's handle 1, counterbalance valve 6, bypass valve 7, hydraulic pump 8 and motor 9 the utility model; Said motor 9 is connected with hydraulic pump 8; Hydraulic pump 8 is communicated with hydraulic oil container 12; Left and right two of guide's handle 1 connect flexible pipes 3, are provided with shuttle valve 2 between 4, and the middle spool of said shuttle valve 2 is connected with the control chamber of counterbalance valve 6 with bypass valve 7 through connecting flexible pipe 5, and left and right two connection flexible pipes 3,4 of guide's handle 1 are connected with the two ends of rotary motor main valve plug control chamber 10 respectively; Said hydraulic pump 8 is connected with rotary motor main valve plug control chamber 10 through oil circuit, and said rotary motor main valve plug control chamber 10 is communicated with rotary motor 11 through oil circuit; The two ends of said counterbalance valve 6 and bypass valve 7 are communicated with rotary motor main valve plug control chamber 10 and hydraulic oil container 12 through oil circuit respectively, and counterbalance valve 6 is provided with the oil circuit 3 that is communicated with rotary motor 11 repairing mouths 13 with the oil circuit that bypass valve 7 is communicated with rotary motor main valve plug control chamber 10.
When the operating principle of the utility model is turned round action about excavator needs; Guide's handle 1 swings; The rotating interface in guide's handle 1 control left and right sides is in open mode; Hydraulic oil flows into shuttle valve 2 and rotary motor main valve plug control chamber 10 through connecting flexible pipe 3,4, opens and closes through spool in the shuttle valve 2 to make hydraulic oil act on the control chamber of counterbalance valve 6 and bypass valve 7 through connection flexible pipe 5 again, improves the opening pressure of counterbalance valve 6 and bypass valve 7.The opening pressure of counterbalance valve 6 is brought up to 3Bar by 1Bar, and the opening pressure of bypass valve 7 is brought up to 5Bar by 3Bar.Under this kind situation, when excavator starts in revolution, can start more stably, reduce hydraulic shock, and during braking, rotary motor 11 return oil pressures improve, and avoid rotary motor 11 emptying phenomenon to occur.But when other move; The rotating interface in guide's handle 1 left and right sides is in closed condition, does not have the hydraulic oil process in the flexible pipe 3,4 of connection shuttle valve 2 and guide's handle, and shuttle valve 2 passes through with also there being pressure oil being connected of counterbalance valve 6, bypass valve 7 in the flexible pipe 5; Promptly there is not hydraulic oil to act on the control chamber of counterbalance valve 6 and bypass valve 7; The opening pressure of counterbalance valve 6 is reduced to 1Bar by 3Bar, and the opening pressure of bypass valve 7 is reduced to 3Bar by 5Bar, and the opening pressure of counterbalance valve 6 and bypass valve 7 reduces.At this moment; The flow through resistance force diminishes of counterbalance valve 6 and bypass valve 7 of the oil return of hydraulic system, promptly the pressure loss of hydraulic system reduces, thereby reduces hydraulic pump 8 power outputs; Reduce the power output of motor 9; Thereby saved fuel oil, reduced discharge amount of exhaust gas, reduced noise, improved efficient, reached the economic effect of energy-conserving and environment-protective.

Claims (1)

1. crawler hypraulic excavator hydraulic control energy saver; It comprises guide's handle, counterbalance valve, bypass valve, hydraulic pump and motor; Said motor is connected with hydraulic pump, and hydraulic pump is communicated with hydraulic oil container, is provided with shuttle valve between left and right two connection flexible pipes of guide's handle; The middle spool that it is characterized in that said shuttle valve is connected with the control chamber of counterbalance valve and bypass valve through connecting flexible pipe, and left and right two connection flexible pipes of guide's handle are connected with the two ends of rotary motor main valve plug control chamber respectively; Said hydraulic pump is connected with rotary motor main valve plug control chamber through oil circuit, and said rotary motor main valve plug control chamber is communicated with rotary motor through oil circuit; The two ends of said counterbalance valve and bypass valve are communicated with rotary motor main valve plug control chamber and hydraulic oil container through oil circuit respectively, and the oil circuit that counterbalance valve and bypass valve are communicated with rotary motor main valve plug control chamber is provided with the oil circuit that is communicated with rotary motor repairing mouth.
CN 201220037066 2012-02-03 2012-02-03 Hydraulically-controlled energy-saving device for crawler-type hydraulic excavator Expired - Fee Related CN202492880U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220037066 CN202492880U (en) 2012-02-03 2012-02-03 Hydraulically-controlled energy-saving device for crawler-type hydraulic excavator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220037066 CN202492880U (en) 2012-02-03 2012-02-03 Hydraulically-controlled energy-saving device for crawler-type hydraulic excavator

Publications (1)

Publication Number Publication Date
CN202492880U true CN202492880U (en) 2012-10-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220037066 Expired - Fee Related CN202492880U (en) 2012-02-03 2012-02-03 Hydraulically-controlled energy-saving device for crawler-type hydraulic excavator

Country Status (1)

Country Link
CN (1) CN202492880U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102535575A (en) * 2012-02-03 2012-07-04 山重建机(济宁)有限公司 Hydraulic control energy-saving device of crawler-type hydraulic digging machine
CN103015483A (en) * 2012-11-30 2013-04-03 三一重机有限公司 Time delay brake system of hydraulic slewing device and engineering machine
CN104153406A (en) * 2014-08-05 2014-11-19 山河智能装备股份有限公司 Excavator with function of switching oil hydraulic circuit according to different working conditions

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102535575A (en) * 2012-02-03 2012-07-04 山重建机(济宁)有限公司 Hydraulic control energy-saving device of crawler-type hydraulic digging machine
CN103015483A (en) * 2012-11-30 2013-04-03 三一重机有限公司 Time delay brake system of hydraulic slewing device and engineering machine
CN103015483B (en) * 2012-11-30 2015-06-10 三一重机有限公司 Time delay brake system of hydraulic slewing device and engineering machine
CN104153406A (en) * 2014-08-05 2014-11-19 山河智能装备股份有限公司 Excavator with function of switching oil hydraulic circuit according to different working conditions

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C14 Grant of patent or utility model
GR01 Patent grant
EXPY Termination of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121017

Termination date: 20150203